— cataclastic /kat'euh klas"tik/ , adj.
/kat'euh klay"sis, keuh tak"leuh sis/ , n. Petrol.
a process of deformation or metamorphism in which the grains of a rock are fractured and rotated.
[ katáklasis refraction, equiv. to katakla-, s. of kataklân to break off, refract, break down ( kata- CATA- + klân to break) + -sis -SIS; cf. Norw kataklasstruktur (1885) ]